In my copy of OCC 6.3, those calls are about 20 lines below. Anyway, I don't really see a problem in that. The array is allocated in the stack, and the only thing that is happening is that the OpenGL method is told the array is 2 floats long when it's really 4 (if it was the other way around, then it would be problematic).
At the end, it's only making that function take 8 more bytes when called than needed, but since those 8 bytes are taken from the stack (which should have way more than that available), it's not a problem.